Scherübl, Zoltán and Sütő, Máté and Kóti, Dávid and Tóvári, Endre and Horváth, Csaba and Kalmár, Tamás and Vasas, Bence Barnabás and Berke, Martin and Kirti, Magdhi and Biasiol, Giorgio and Csonka, Szabolcs and Makk, Péter and Fülöp, Gergő (2025) Determination of the current-phase relation of an InAs 2DEG Josephson junction with a microwave resonator. PHYSICAL REVIEW RESEARCH, 7 (2). No. 023173. ISSN 2643-1564
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Abstract
Semiconductor-superconductor hybrid nanocircuits are of high interest because of their potential applications in quantum computing. Semiconductors with strong spin-orbit coupling and large g factor are particularly attractive since they are the basic building blocks of novel qubit architectures. However, for the engineering of these complex circuits, the building blocks must be characterized in detail. We have investigated a Josephson junction where the weak link is a two-dimensional electron gas (2DEG) hosted in an InAs/InGaAs heterostructure grown on a GaAs substrate. We employed the epitaxially grown Al layer as a superconducting contact to form an rf SQUID, and also to create a microwave resonator for sensing the Josephson inductance. We determined the gate-dependent current-phase relation and observed supercurrent interference in out-of-plane magnetic fields. With the application of an in-plane magnetic field, we induced asymmetry in the interference pattern, which was found to be anisotropic in the device plane.
| Item Type: | Article |
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| Additional Information: | This work acknowledges support from the MultiSpin and 2DSOTECH FlagERA networks, the OTKA Grants No. K138433, No. K134437, and No. PD134758, the VEKOP Grant No. 2.3.3-15-2017-00015, the EIC Pathfinder Challenge Grant QuKiT, the EU SuperGate network, the COST Action CA21144 (SUPERQUMAT), CA20116 (OPERA), PNRR MUR project PE0000023-NQSTI, and the EU Horizon 2020 programme under Grant Agreement No. 101007417 within the framework of the NFFA-Europe Pilot Transnational Access Activity (proposal ID 380 in collaboration with CNR, Trieste). This research was supported by the Ministry of Culture and Innovation and the National Research, Development and Innovation Office within the Quantum Information National Laboratory of Hungary (Grant No. 2022-2.1.1-NL-2022-00004) and the Doctoral Excellence Fellowship Programme (DCEP) DCEP-23-1-BME-8, by the FET Open AndQC and SuperGate networks and by the European Research Council ERC Project Twistrain, the János Bolyai Research Scholarship of the Hungarian Academy of Sciences, and the ÚNKP-23-5-BME-413 New National Excellence Program. |
| Subjects: | Q Science / természettudomány > QC Physics / fizika |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 02 Sep 2025 13:55 |
| Last Modified: | 02 Sep 2025 13:55 |
| URI: | https://real.mtak.hu/id/eprint/223187 |
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